Mulberry field spraying device

Abstract

The utility model discloses a mulberry garden pesticide spraying device belongs to agricultural equipment technical field, and the device includes remote control car, medicine box, power component, air supply system and atomization injection unit. Remote control car carries medicine box and independently travels in the mulberry garden, air supply system sets up at the rear end of the car body, and airflow is driven by axial flow fan and impacts the end plate of resistance flow through the tubular air duct, and the axial airflow is converted into radial diffusion vortex through the circumferential distribution of air guide cone, and the atomization spray head is arranged at the air outlet, and the spray axis and airflow meet and form the gas-liquid two-phase flow field, and the penetration of medicine mist to the branch leaf gap is enhanced. The device of the utility model effectively improves the penetration of atomized fertilizer and pesticide in the mulberry branch, improves the efficiency and quality of mulberry garden pesticide spraying, and reduces the labor cost and labor intensity.

Description

Technical Field

[0001] This utility model relates to the field of agricultural equipment technology, and in particular to a spraying device for mulberry orchards. Background Technology

[0002] Manual spraying and drone spraying are both common methods of pesticide application. However, manual spraying is less efficient, and pesticides can cause harm to humans. Therefore, there is a growing trend towards more efficient drone spraying. But because mulberry orchards are densely wooded with intertwined branches and lush foliage, it is difficult for drones to spray pesticides or fertilizers effectively inside the orchard. Therefore, it is essential to design unmanned spraying devices that can move freely within the orchard.

[0003] Chinese patent application CN112772092A discloses an adjustable-range automatic fertilization and pesticide application device for silkworm rearing. This device, through the coordination of its body, driver's cab, tracked rollers, water tank, pesticide tank, water pump, branch pipes, valves, and spraying components, allows for precise control of the spray range during operation. The clearance between the slide rail and the slide rod, along with the reciprocating extension and retraction of the cylinder, enables the support rod to drive the hose to open and close repeatedly, thereby adjusting the spray range of the nozzles. This results in more precise fertilization and pesticide application, meeting various needs. However, this device still uses a downward spraying method. Although the coverage area can be adjusted by swinging the support rod, the sprayed fertilizer and pesticide are blocked by dense foliage and cannot effectively penetrate downwards. Utility Model Content

[0004] To address the aforementioned problems, one objective of this utility model is to provide a spraying device suitable for mulberry orchards. This device travels through the interior of the orchard and relies on nozzles and axial fans to enhance the penetration of fertilizer and pesticide sprays into the lush foliage, thereby improving the spraying effect.

[0005] To achieve these objectives and other advantages of this utility model, this utility model provides a mulberry orchard spraying device, comprising:

[0006] A remote-controlled car, capable of traversing the mulberry orchard;

[0007] A medicine tank, mounted on the remote-controlled vehicle, is used to load the fertilizers and pesticides required by the atomizing spray unit;

[0008] The power unit, installed on the remote-controlled vehicle, provides power for the operation of the remote-controlled vehicle, as well as the operation of the air supply system and the atomizing spray unit;

[0009] The air supply system is located at the rear end of the remote-controlled vehicle in the direction of travel, and includes a fan that supplies air to the cylindrical air duct, an axially extending cylindrical air duct, and a number of air outlets distributed circumferentially around the outer wall of the air duct.

[0010] The atomizing spray unit includes high-pressure atomizing nozzles located at each air outlet, infusion pipelines connected to the medicine tank, and a pressure pump. The spray axis of the high-pressure atomizing nozzles intersects with the airflow direction of the corresponding air outlets to form a gas-liquid two-phase flow field, allowing the atomized medicine to penetrate the gaps between the branches and leaves of the mulberry tree.

[0011] Preferably, the air outlet end of the cylindrical air duct is provided with a flow-blocking end plate, and the air inlet end is equipped with an axial flow fan. The axial airflow generated by the axial flow fan impacts the flow-blocking end plate along the air duct axis and forms a radially diffused vortex, which is then ejected from the air outlet.

[0012] Preferably, the windward side of the flow-blocking end plate is provided with a guide cone. The guide cone extends radially from the center of the flow-blocking end plate to the periphery. The apex of the guide cone faces the incoming flow direction of the cylindrical air duct. Adjacent guide cones form a flow-guiding channel. After the axial airflow generated by the axial fan impacts the guide cone, it forms a flow split along the flow-guiding channel.

[0013] Preferably, the windward side of the flow-blocking end plate has a conical protrusion at its center, and the air guide cone extends outward from the center of the conical protrusion to convert the impact of the axial airflow into a radial flow distributed along the flow guide channel.

[0014] Preferably, a tapered guide section is provided along the radial extension direction of the guide cone to accelerate the airflow, and the cross-section of the guide section is arc-shaped or V-shaped.

[0015] Preferably, the outer end outlet edge of the guide section is hinged with an adjustment plate via a rotating shaft to adjust the size of the air outlet and the airflow direction.

[0016] Preferably, the two ends of the rotating shaft of the adjusting plate are provided with disc spring assemblies, which are composed of 3-7 stacked disc springs; when the disc spring assemblies apply axial preload and the airflow pressure pushes the adjusting plate to deflect, the disc spring assemblies generate nonlinear elastic resistance.

[0017] Preferably, the power component includes two power systems: a diesel engine power system and an electric power system; the diesel engine power system is used to drive the atomizing injection unit and the air supply system; the electric power system is used to drive the remote-controlled vehicle.

[0018] Preferably, a centrifugal clutch is added between the diesel engine power system and the load. The opening and closing of the centrifugal clutch is determined by the diesel engine speed. When the clutch is open, the diesel engine power cannot be transmitted to the load end. When the clutch is closed, the diesel engine power can be transmitted to the load end through the transmission system, driving the atomizing injection unit and the air supply system into working state.

[0019] Preferably, two stepper motors are connected to the pressure reducing valve and throttle control switch of the diesel engine via steel wire ropes for electric control of the pressure reducing valve and throttle. The two stepper motors are installed in the system equipment compartment of the remote control vehicle, and the switching circuit of the diesel engine starter motor is also connected to the equipment compartment. The control circuits of the stepper motors and the switching circuits of the diesel engine starter motor are connected to the main control computer. The remote control is used to control the main control computer to send working commands to the stepper motors and the diesel engine starter motor. The remote control is equipped with a diesel engine start / stop lever switch and a running lever switch to control the diesel engine in three states: stop, start, and run, respectively, for remote one-button control.

[0020] Preferably, the height of the remote-controlled vehicle does not exceed 1 meter, for example, 0.6 to 0.9 meters, and the width is set according to the row spacing of the mulberry orchard, not exceeding 1.5 meters, for example, 0.6 to 1 meter. The length is 1 to 3 meters, for example, 2 meters.

[0021] This utility model has at least the following beneficial effects:

[0022] 1. This utility model, by setting a nozzle at the air outlet, allows the atomizing spray unit to atomize and spray the fertilizer and pesticide in the medicine tank through the nozzle. At the same time, the airflow from the air outlet pushes the atomized fertilizer and pesticide deep into the branches and leaves of the mulberry tree. This effectively solves the problem of fertilizer and pesticide being difficult to penetrate dense branches and leaves in traditional spraying methods, improves the penetration of fertilizer and pesticide, ensures that fertilizer and pesticide can cover all parts of the branches and leaves of the mulberry tree more evenly, improves the spraying effect, and protects the healthy growth of the mulberry tree.

[0023] 2. This utility model utilizes a flow-blocking end plate to convert the axial airflow of the axial fan into a radial vortex, thereby improving the uniformity of airflow distribution. The conical protrusion guides the central airflow, further enhancing the flow distribution stability. The air guide cone structure achieves orderly airflow distribution. The tapered guide section accelerates the airflow and enhances the penetration of mist droplets.

[0024] 3. The power components of this utility model adopt a design that combines a diesel engine power system and an electric power system; the diesel engine power system is used to drive the atomizing injection unit and the air supply system, which can withstand a large load, ensuring the stable operation of the spraying and air supply equipment, while improving the endurance and meeting the needs of long-term spraying operations; the electric power system is used to drive the remote control vehicle, which facilitates remote control and unmanned driving functions, making the operation of the remote control vehicle more flexible and precise, and adapting to the complex terrain and environment inside the mulberry garden.

[0025] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the mulberry orchard spraying device of this utility model;

[0027] Figure 2 This is a schematic diagram of the diesel engine power system of this utility model;

[0028] Figure 3 This is an exploded view of the air supply system of this utility model;

[0029] Figure 4 This is a schematic diagram of the assembled air supply system of this utility model;

[0030] Figure 5 This is a schematic diagram of the flow guide section of this utility model.

[0031] The components include: remote control car 1, medicine box 2, power unit 3, diesel engine 301, motor 302, battery pack 303, frame 304, centrifugal clutch 305, air supply system 4, axial fan 401, cylindrical air duct 402, air outlet 403, air guide cone 404, guide section 405, adjusting plate 406, flow obstruction end plate 407, cover plate 408, conical protrusion 409, rotating shaft 410, air guide ridge 411, disc spring assembly 412, preload nut 413, pressure pump 501, infusion pipeline 502, nozzle 503, wireless communication module 6, and mounting plate 7. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the embodiments, so that those skilled in the art can implement it based on the description.

[0033] like Figures 1-5 As shown, the present invention provides a mulberry orchard spraying device, comprising:

[0034] like Figure 1 As shown, the remote-controlled vehicle features a narrow, low-profile structure. In one example, the vehicle is 2.1 meters long, 0.85 meters wide, and 0.9 meters high. This size design allows the vehicle to easily navigate the narrow rows within the mulberry orchard. The vehicle body is made of high-strength aluminum alloy, ensuring structural strength while reducing overall weight and energy consumption. The remote-controlled vehicle has several equipment compartments for installing other components. It is equipped with two power systems: a diesel engine and an electric motor. In one example, the vehicle uses a tracked walking mechanism. The vehicle is also equipped with a wireless communication module and a positioning module.

[0035] The power unit, installed on the remote-controlled vehicle, provides power for the operation of the remote-controlled vehicle, as well as the operation of the air supply system and the atomizing spray unit.

[0036] First-aid kit; such as Figure 1As shown, the medicine tank is installed on top of the remote-controlled car. A suitable capacity can be selected based on actual needs, such as a 350-liter tank. Preferably, the tank is made of corrosion-resistant plastic, which effectively prevents fertilizers and pesticides from corroding the tank and extends its service life. The tank is bolted to the car body, making installation and removal convenient and facilitating cleaning and replacement.

[0037] The atomizing spray unit includes high-pressure atomizing nozzles located at each air outlet, infusion pipelines connected to the medicine tank, and a pressure pump. The spray axis of the high-pressure atomizing nozzles intersects with the airflow direction of the corresponding air outlet, forming a gas-liquid two-phase flow field, allowing the atomized medicine to penetrate the gaps between the branches and leaves of the mulberry tree. Preferably, the nozzles can be connected to the body of a remote-controlled vehicle via a rotating joint, and the angle of the nozzles can be adjusted remotely according to the growth of the mulberry branches and leaves to ensure that the spray is accurately applied to the target location. In this embodiment, there are a total of 9 nozzles, circumferentially arranged outside the air supply system, with each nozzle corresponding to one air outlet.

[0038] The air supply system, installed at the rear end in the direction of travel of the remote-controlled car, consists primarily of an axial fan. This fan is connected to the diesel engine via a drive belt or chain and is subsequently driven by the engine. One end of the cylindrical air duct's outlet is sealed with a baffle plate, such as... Figure 3 As shown, the flow-blocking plate seals one end of the air outlet and has mounting holes for easy installation and fixation to the mounting plate 7 at the rear of the remote control vehicle. The cylindrical air duct has several air outlets evenly distributed around its circumference (approximately 10 in the example, but the number can be adjusted according to actual needs), corresponding one-to-one with the number and position of the high-pressure atomizing nozzles. The spray axis of the high-pressure atomizing nozzles intersects with the airflow direction of the corresponding air outlet, forming a gas-liquid two-phase flow field. Because the air outlet of the air duct is closed, the strong airflow generated by the axial fan can only be ejected from each air outlet, forming several concentrated airflows with a certain pressure, effectively enhancing the pushing ability of the fertilizer and pesticide spray, allowing the atomized pesticide stream to penetrate the gaps between the mulberry tree branches and leaves.

[0039] Furthermore, in another implementation, such as Figure 3 and Figure 4 As shown, the cylindrical air duct 402 has a flow-blocking end plate 407 at the air outlet and an axial flow fan 401 at the air inlet. The axial airflow generated by the axial flow fan impacts the flow-blocking end plate along the air duct axis, forming a radially diffusing vortex, which is then ejected from the air outlet, improving the uniformity of airflow distribution. In the illustration, the flow-blocking end plate is fixed to the mounting plate of the remote control car for easy assembly and disassembly.

[0040] Furthermore, in another implementation, such as Figure 3As shown, the windward side of the flow-blocking end plate is provided with a guide cone 404. The guide cone extends radially from the center of the flow-blocking end plate to the periphery. The apex of the guide cone faces the incoming flow direction of the cylindrical air duct. Adjacent guide cones form a flow-guiding channel. After the axial airflow generated by the axial fan impacts the guide cone, it forms a split along the flow-guiding channel.

[0041] Because the airflow generates disordered turbulence after impacting the end plate, resulting in significant energy loss, the guide cone in this embodiment forms a wind-breaking structure to achieve orderly airflow diversion and reduce airflow energy loss. For example, the guide cone is formed by bending 304 stainless steel plate, with a height of 40mm and a cone angle of 60°. Adjacent guide cones are evenly distributed with a spacing of 20~60° (set according to the actual number of air outlets and nozzles). The root of the guide cone extends outward from near the center of the flow-blocking end plate (the axial fan shaft through-hole is opened in the center of the flow-blocking end plate), forming several guide channels with gradually changing widths. After the axial airflow impacts the guide cone, multiple radially diverted airflows are formed along the guide channels.

[0042] Furthermore, in another implementation, such as Figure 3 As shown, the windward side of the flow-blocking end plate has a conical protrusion 409 at its center, and the air guide cone extends outward from the center of the conical protrusion, converting the impact of the axial airflow into a radial flow distributed along the flow guide channel.

[0043] Because the pressure fluctuation is caused by the accumulation of airflow in the center of the flow-blocking end plate, this embodiment provides a conical protrusion in the center of the flow-blocking end plate. The size of the conical protrusion is the same as or smaller than that of the cylindrical air duct. For example, the height of the conical protrusion is 30mm and the bottom diameter is 400mm (the diameter of the cylindrical air duct is 400mm). The air guide cone extends radially from the root of the cone to guide the central airflow and improve the flow distribution stability.

[0044] Furthermore, in another implementation, such as Figure 3 As shown, a tapered guide section 405 is provided along the radial extension direction of the guide cone, which accelerates the airflow. This guide section has an arc-shaped or V-shaped structure. In the illustration, the guide section 405 is a polygonal structure composed of several plates, with a central protrusion forming an arc or V-shape, causing the guide channel to contract at this point, thus accelerating the airflow. In the illustration, a cover plate 408 covers one side of the flow-blocking end plate, forming a relatively closed guide channel with the guide cone and guide section. The tapered guide section in this embodiment accelerates the airflow and improves the penetration power of droplets.

[0045] Furthermore, in another implementation, such as Figures 3-5As shown, an adjustment plate 406 is hinged to the outer outlet edge of the guide section for adjusting the size of the air outlet and the airflow direction. In the illustration, the adjustment plate can be a metal plate, connected to the guide section by a rotating shaft or hinge. Depending on the site conditions, the adjustment plate can be adjusted to the required angle and then fixed (e.g., by tightening the nuts at both ends of the rotating shaft to lock the adjustment plate), so that the air outlet reaches a suitable opening or orientation.

[0046] Furthermore, in another implementation, such as Figure 5 As shown, disc spring assemblies and preload nuts are coaxially sleeved at both ends of the rotating shaft of the adjusting plate. The disc spring assembly is composed of 3-7 stacked disc springs with a cone angle α of 7-10 degrees and a thickness t of 1.2-2 mm. It is made of stainless steel. An axial preload is applied to the disc spring assembly by the preload nuts. When the airflow pressure pushes the adjusting plate to deflect, the disc spring assembly generates elastic resistance, which allows the adjusting plate to adjust the size of the air outlet according to the airflow pressure.

[0047] Furthermore, in another embodiment, the surfaces of the guide section and the regulating plate are provided with several raised air guide ridges extending along the airflow direction. In the illustration, parallel air guide ridges are provided on the inner wall of the guide section and the windward surface of the regulating plate, with a ridge height H = 1.2-2.5 mm and a ridge spacing P = 3H ± 0.2H. The air guide ridges serve to rectify the airflow and reduce turbulence losses.

[0048] Furthermore, in another embodiment, the provided power components include a diesel engine power system and an electric power system.

[0049] Diesel engine power system; it is equipped with a small, high-efficiency diesel engine to power the atomizing injection unit and the air supply system. For example... Figure 3 As shown, the diesel engine, high-pressure water pump, etc., are mounted on frame 304, which is fixed to the remote control vehicle. A centrifugal clutch is installed in the transmission system between the diesel engine and the load ends such as the high-pressure water pump and axial fan. The centrifugal clutch is installed close to the diesel engine output shaft and is connected to the diesel engine output shaft via a spline. The other end is connected to the load input shaft via a drive belt or chain.

[0050] The electric power system comprises several drive motors and a battery pack. The output shafts of the motors are connected to the tracked walking mechanism (or via a transmission mechanism such as a gearbox) to drive the walking mechanism. The electric power system is equipped with a large-capacity lithium battery pack, with a capacity of up to 18 kWh. The battery pack is mounted on the remote-controlled vehicle to provide power to the drive motors.

[0051] In another embodiment, the electric power system is also equipped with a motor controller, which is connected to the remote controller via a wireless communication module. The operator can control the motor speed and direction through the remote controller to achieve unmanned driving of the remote-controlled car. The operator can also preset the travel route, and the motor controller will control the remote-controlled car to run according to the preset travel route.

[0052] In another embodiment, a centrifugal clutch is added between the diesel engine power system and the load. The engagement and disengagement of the centrifugal clutch are determined by the diesel engine speed. When the clutch is disengaged, the diesel engine power cannot be transmitted to the load. When the clutch is engaged, the diesel engine power can be transmitted to the load through the transmission system, driving the atomizing injection unit and the air supply system into operation. Conventionally, the clutch includes: a drive disc fixed to the diesel engine output shaft, a driven disc fixed to the transmission mechanism input shaft, centrifugal blocks evenly distributed around the drive disc, a tension spring connecting the centrifugal blocks, and a counterweight of the centrifugal blocks with a stiffness matching that of the tension spring. When the diesel engine speed reaches 1800 rpm, the centrifugal blocks expand outward and press against the inner wall of the driven disc to form a power transmission.

[0053] In this embodiment, when the diesel engine speed is below 1800 rpm, the centrifugal block of the centrifugal clutch cannot tightly engage with the clutch housing due to insufficient centrifugal force, and is in an open state. At this time, the diesel engine power cannot be transmitted to the load end. When the diesel engine speed reaches or exceeds 1800 rpm, the centrifugal block expands outward under the action of centrifugal force and tightly engages with the clutch housing. The clutch is closed, and the diesel engine power can be smoothly transmitted to the load end, driving the high-pressure water pump and axial flow fan to work.

[0054] Furthermore, in another embodiment, to achieve remote electric control, two stepper motors are installed in the system equipment compartment of the remote-controlled vehicle. One stepper motor is connected to the diesel engine's pressure reducing valve via a steel wire rope, and the other stepper motor is connected to the diesel engine's throttle control switch via a steel wire rope. One end of the steel wire rope is fixed to a winding wheel on the output shaft of the stepper motor, and the other end is connected to the operating lever of the pressure reducing valve or the throttle control switch. The switching circuit of the diesel engine starter motor is also connected to the equipment compartment and, together with the control circuit of the stepper motor, to the main control computer. The main control computer is installed in the equipment compartment and has corresponding control programs written inside. The main control computer is connected to the remote controller via a wireless communication module, and can receive commands from the remote controller and control the operation of the stepper motor and the diesel engine starter motor according to the commands. A diesel engine start / stop lever switch and a run lever switch are added to the remote controller. The operator can use these lever switches to issue start, stop, and run signals to achieve remote one-button control of the diesel engine.

[0055] One implementation process of this embodiment is as follows:

[0056] Initial state: The start / stop switch and run switch of the remote control are both in the off position, the entire device is in a stopped and shut-off state, the diesel engine is off and the load is not working.

[0057] Startup Status: The remote-controlled vehicle moves automatically along a preset route, or is controlled by the operator via remote control. The operator moves the start / stop switch on the remote control to the on position, while keeping the run switch off. The remote control sends a diesel engine start signal to the main control computer. The main control computer controls the diesel engine pressure relief valve stepper motor to pull down and hold the pressure relief valve, and the diesel engine throttle stepper motor to pull the throttle to the start position and hold it. After both stepper motors have reached their positions, the main control computer energizes the diesel engine starter motor, starting the diesel engine for 2 seconds. After the diesel engine starts, the pressure relief valve stepper motor returns to its original position, and the pressure relief valve automatically rebounds under spring pressure, completing the starting process. If the diesel engine fails to start normally, the operator moves the start / stop switch on the remote control back to the off position. The throttle stepper motor returns to its original position, and the throttle automatically rebounds under spring pressure. After 30 seconds, the start / stop switch is moved back to the on position, and the main control computer automatically repeats the above operation to start the diesel engine. At this time, the diesel engine is idling at a speed below 1800 rpm, the centrifugal clutch is disengaged, and the load is not working.

[0058] Operating Status: The operator keeps the diesel engine start / stop switch on the remote control in the "on" position and moves the "run" switch to the "on" position. The main control computer controls the throttle stepper motor to pull the throttle to the "run" position, increasing the diesel engine speed to 1900-2000 rpm. The centrifugal clutch engages, driving the high-pressure water pump and axial fan to start working. The operator sets the nozzle angle and axial fan speed on the remote controller. The high-pressure water pump draws and pressurizes the fertilizer and pesticide from the tank, then delivers it to each nozzle through the infusion pipeline. The nozzles atomize the fertilizer and pesticide and spray it out. The airflow generated by the axial fan flows within the cylindrical air duct, passing through the baffle plate, guide cone, tapered guide section, and adjusting plate, and is then ejected from each air outlet, forming several strong airflows that converge with the atomized airflow from the nozzles, pushing the atomized fertilizer and pesticide deep into the mulberry tree branches and leaves, thus achieving efficient spraying.

[0059] After the work is completed: The operator turns the remote control's start switch back to the off position. The main control computer controls the throttle stepper motor to return to the start position and maintain it. The throttle, under the action of the spring, rebounds to the start position and maintains it, and the system is in the start state. At this time, the operator turns the remote control's start / stop switch to the off position. The main control computer controls the pressure reducing valve stepper motor to pull down the pressure reducing valve and maintain it for 2 seconds. The throttle stepper motor returns to its initial position, and the throttle, under the action of the spring, also returns to its initial position, stopping fuel supply. After 2 seconds, the pressure reducing valve stepper motor returns to its original position, and the pressure reducing valve automatically rebounds to its initial position, stopping the diesel engine.

[0060] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for this utility model. Other modifications can be easily made by those skilled in the art.

Claims

1. A pesticide spraying device for mulberry orchards, characterized in that, include: A remote-controlled car, capable of traversing the mulberry orchard; A medicine tank, mounted on the remote-controlled vehicle, is used to load the fertilizers and pesticides required by the atomizing spray unit; The power unit, installed on the remote-controlled vehicle, provides power for the operation of the remote-controlled vehicle, as well as the operation of the air supply system and the atomizing spray unit; The air supply system is located at the rear end of the remote-controlled vehicle in the direction of travel, and includes a fan that supplies air to the cylindrical air duct, an axially extending cylindrical air duct, and several air outlets distributed circumferentially around the outer wall of the air duct. The atomizing spray unit includes high-pressure atomizing nozzles located at each air outlet, infusion pipelines connected to the medicine tank, and a pressure pump. The spray axis of the high-pressure atomizing nozzles intersects with the airflow direction of the corresponding air outlets to form a gas-liquid two-phase flow field, allowing the atomized medicine to penetrate the gaps between the branches and leaves of the mulberry tree.

2. The mulberry orchard spraying device as described in claim 1, characterized in that, The cylindrical air duct is equipped with a flow-blocking end plate at the air outlet and an axial flow fan at the air inlet. The axial airflow generated by the axial flow fan impacts the flow-blocking end plate along the air duct axis and forms a radially diffused vortex, which is then ejected from the air outlet.

3. The mulberry orchard spraying device as described in claim 2, characterized in that, The windward side of the flow-blocking end plate is provided with a guide cone. The guide cone extends radially from the center of the flow-blocking end plate to the periphery. The apex of the guide cone faces the incoming flow direction of the cylindrical air duct. Adjacent guide cones form a flow-guiding channel. After the axial airflow generated by the axial fan impacts the guide cone, it forms a split along the flow-guiding channel.

4. The mulberry orchard spraying device as described in claim 3, characterized in that, The windward side of the flow-blocking end plate has a conical protrusion at its center, and the air guide cone extends outward from the center of the conical protrusion, converting the impact of the axial airflow into a radial flow distributed along the flow guide channel.

5. The mulberry orchard spraying device as described in claim 3, characterized in that, A tapered guide section is provided along the radial extension direction of the air guide cone to accelerate the airflow. The cross-section of the guide section is arc-shaped or V-shaped.

6. The mulberry orchard spraying device as described in claim 5, characterized in that, An adjustment plate is hinged to the outer end of the guide section via a rotating shaft to adjust the size of the air outlet and the direction of airflow.

7. The mulberry orchard spraying device as described in claim 6, characterized in that, The two ends of the rotating shaft of the regulating plate are provided with disc spring assemblies, which are composed of 3-7 mating disc springs stacked together. When the disc spring assemblies apply axial preload and the airflow pressure pushes the regulating plate to deflect, the disc spring assemblies generate nonlinear elastic resistance.

8. The mulberry orchard spraying device as described in claim 1, characterized in that, The power components include two power systems: a diesel engine power system and an electric power system. The diesel engine power system is used to drive the atomizing injection unit and the air supply system. The electric power system is used to drive the remote-controlled vehicle.

9. The mulberry orchard spraying device as described in claim 8, characterized in that, A centrifugal clutch is added between the diesel engine power system and the load. The opening and closing of the centrifugal clutch is determined by the diesel engine speed. When the clutch is open, the diesel engine power cannot be transmitted to the load end. When the clutch is closed, the diesel engine power can be transmitted to the load end through the transmission system, driving the atomizing injection unit and the air supply system to enter the working state.

10. The mulberry orchard spraying device as described in claim 9, characterized in that, Two stepper motors are connected to the diesel engine's pressure reducing valve and throttle control switch via steel wire ropes, respectively, for electric control of the pressure reducing valve and throttle. The two stepper motors are installed in the system equipment compartment of the remote control vehicle, and the switching circuit of the diesel engine starter motor is also connected to the equipment compartment. The control circuits of the stepper motors and the switching circuits of the diesel engine starter motor are connected to the main control computer. The remote control is used to control the main control computer to send working commands to the stepper motors and the diesel engine starter motor. The remote control is equipped with a diesel engine start / stop lever switch and a running lever switch, which control the diesel engine in three states: stop, start, and run, respectively, for remote one-button control.

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